Sincerity and truth are the basis of every virtue.
Give a man a fish, feed home for a day. Teach a man to fish, feed for a lifetime.
Faithfulness and sincerity first of all.
Be loyal and trustworthy. Do not befriend anyone who is lower than yourself in this regard.
Base yourself in loyalty and trust. Don't be companion with those who are not your moral equal. When you make a mistake, don't hesitate to correct it.
The father who does not teach his son his duties is equally guilty with the son who neglects them.